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Full text of "Alaskan glacier studies of the National Geographic Society in the Yakutat Bay, Prince William Sound and lower Copper River regions"

GLACIERS OF HARRIMAN FIORD AND PORT WELLS
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therefore shallower than is normal in the fiord. The association of this shoal with a broad point between Baker and Detached Glaciers (Fig. 47), which projects 1150 feet into the fiord and has morainic topography, suggests a cres-centic moraine built here by the Serpentine Glacier. The water deepens rapidly to 258 feet west of this shallow area, and to 282 feet east of it. Our soundings are not detailed enough to determine whether or not these 90 and 120 foot irregularities represent a continuous submerged moraine built by the formerly coalescing Harriman and Surprise Glaciers, or indeed to show conclusively that they are moraines rather than irregularities of the fiord bottom due to differential erosion.
At the northern end (PI. CXLI) of Port Wells there are several sets of shoals which are best interpreted as submerged terminal moraines, or moraine bars, of the sort seen in Unakwik Inlet, but with less of their length exposed at low tide. They span the mouths of Barry Arm and
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6 miles
FlQ. 50.    StJBMABDTffl TOPOGRAPHY OF TTARRTMAK
Soundings in feet.    Submerged contour interval 200 feet   Photographic Stations A, DD, etc.   (Outline of shores and glaciers after Grant and Higgins.)